#	$NetBSD: Makefile.image,v 1.40 2017/02/11 03:07:06 christos Exp $
#
# Makefile snippet to build a tree from the provided lists,
# and make an ffs file system image from that tree
#
# Required variables:
#	NETBSDSRCDIR	top level of src tree (set by <bsd.own.mk>)
#	LISTS		list file(s) to use
#	IMAGEDEPENDS	depends for ${IMAGE}
#	IMAGEENDIAN	endianness of ${IMAGE}
#	IMAGESIZE	size of ${IMAGE}
#	MTREECONF	mtree specfiles to use to build a master specfile
#
# Optional variables:
#	IMAGE		name of target image
#	IMAGEPREBUILD	additional operations to run pre image creation
#	IMAGEPOSTBUILD	operation to run on ${IMAGE} ${.TARGET} after its built
#			(if this returns non zero, ${.TARGET} is removed)
#	CRUNCHBIN	name of crunchgen(1)ed binary
#	DESTDIR		destination directory
#	MAKEFS_FLAGS	extra options to ${TOOL_MAKEFS}
#	PARSELISTENV	environment variables to set for parselist.awk
#	WORKDIR		directory to build image in to 
#	IMAGETAR	tar.gz file to create containing ${IMAGE}'s contents
#
#	IMAGE_RELEASEDIR	where to install ${IMAGE}.gz
#	IMAGETAR_RELEASEDIR	where to install ${IMAGETAR}
#

.if !defined(_MAKEFILE_IMAGE_)
_MAKEFILE_IMAGE_=1


WORKDIR?=	work
WORKSPEC?=	work.spec
WORKBUILT?=	work.built

.include "${DISTRIBDIR}/common/Makefile.parselist"

PARSELISTENV+=	TARGETDIR=${.OBJDIR}/${WORKDIR:Q}

GZIP_FLAGS= -9 ${GZIP_N_FLAG}

.if ${MKREPRO_TIMESTAMP:Uno} != "no"
MAKEFS_TIMESTAMP=-T "${MKREPRO_TIMESTAMP}"
PAX_TIMESTAMP=--timestamp "${MKREPRO_TIMESTAMP}"
.endif

.if !target(${WORKBUILT})					# {
${WORKBUILT}: ${IMAGEDEPENDS} ${WORKSPEC} ${PARSELISTDEP} ${LISTS}
#	There is a .PHONY ${CRUNCHBIN}, so check if out of date by hand
#	Default to `.' if ${CRUNCHBIN} isn't set, to always force a rebuild.
	[ "${.OODATE}" = ${CRUNCHBIN:U.} -a -f ${WORKBUILT} -a ${WORKBUILT} -nt ${CRUNCHBIN:U.} ]  || { \
	${_MKSHMSG} "  build " ${.CURDIR:T}/${WORKDIR}; \
	rm -rf ${WORKDIR} ${WORKBUILT}; \
	mkdir -m 755 ${WORKDIR} &&  \
	${TOOL_MTREE} -def ${WORKSPEC} -p ${WORKDIR}/ -UW && \
	${PARSELIST} -v mode=populate ${LISTS} | \
	${HOST_SH} -e ${POPULATE_DEBUG} \
	&& touch ${WORKBUILT} ; \
	}

CLEANFILES+=	${WORKBUILT}

clean cleandir distclean: cleanfsimage

.PHONY: cleanfsimage

cleanfsimage:
	-rm -rf ${WORKDIR} ${WORKBUILT}

.endif	# ! target (${WORKBUILT})				# }

.if !target(${WORKSPEC})					# {
${WORKSPEC}: ${MTREECONF} ${LISTS} ${PARSELISTDEP}
	${_MKTARGET_CREATE}
	-rm -f ${.TARGET} ${.TARGET}.tmp
	( for i in ${MTREECONF}; do	\
		echo "# --" ; \
		echo "# entries from: $$i" ; \
		echo "#" ; \
		cat $$i ;		\
		echo "/unset all" ;	\
	done ) >> ${.TARGET}.tmp
	${PARSELIST} -v mode=mtree ${LISTS} >> ${.TARGET}.tmp \
	&& mv ${.TARGET}.tmp ${.TARGET}

CLEANFILES+=	${WORKSPEC} ${WORKSPEC}.tmp
.endif	# ! target (${WORKSPEC})				# }

.if defined(IMAGE)						# {
IMGMAKEFSOPTIONS?= -o bsize=4096,fsize=512
${IMAGE}: ${WORKBUILT}
.if defined(IMAGEPREBUILD)
	${IMAGEPREBUILD}
.endif
	[ "${.OODATE}" = ${WORKBUILT} -a -f ${IMAGE} -a ! ${IMAGE} -ot ${WORKBUILT} ]  || { \
	${_MKSHMSG_CREATE} ${.CURDIR:T}/${.TARGET}; \
	rm -f ${.TARGET} ${.TARGET}.tmp; \
	${TOOL_MAKEFS} -t ffs -B ${IMAGEENDIAN} -s ${IMAGESIZE} -F ${WORKSPEC} \
	    ${MAKEFS_TIMESTAMP} -N ${NETBSDSRCDIR}/etc ${IMGMAKEFSOPTIONS} \
	    -o optimization=space,minfree=0 \
	    ${MAKEFS_FLAGS} ${.TARGET}.tmp ${WORKDIR} \
	&& mv -f ${.TARGET}.tmp ${.TARGET}; \
	}
.if defined(IMAGEPOSTBUILD)
	${IMAGEPOSTBUILD} || { rm -f ${.TARGET} ; false; }
.endif

.PHONY: fsimage
fsimage: ${IMAGE}

${IMAGE}.gz: ${IMAGE}
	${_MKTARGET_CREATE}
	-rm -f ${.TARGET}
	${TOOL_GZIP} ${GZIP_FLAGS} -c ${.ALLSRC} > ${.TARGET}

realall: ${IMAGE}

.if defined(IMAGE_RELEASEDIR)
release:: check_RELEASEDIR .WAIT ${IMAGE}.gz
	${RELEASE_INSTALL} ${IMAGE}.gz \
	    ${RELEASEDIR}/${RELEASEMACHINEDIR}/${IMAGE_RELEASEDIR}
.endif

CLEANFILES+=	${IMAGE} ${IMAGE}.gz ${IMAGE}.tmp
.endif	# ! defined(IMAGE)					# }


.if defined(IMAGETAR)						# {
${IMAGETAR}: ${WORKBUILT} ${WORKSPEC} ${IMAGEDEPENDS}
	${_MKTARGET_CREATE}
	( cd ${WORKDIR}; \
	  GZIP=${GZIP_FLAGS:Q} \
	  ${TOOL_PAX} ${PAX_TIMESTAMP} --use-compress-program=${TOOL_GZIP:Q} \
	      -ON ${NETBSDSRCDIR}/etc -wdM <${.OBJDIR}/${WORKSPEC} \
	) > ${.TARGET}.tmp \
	&& mv ${.TARGET}.tmp ${.TARGET}

realall: ${IMAGETAR}

CLEANFILES+=	${IMAGETAR} ${IMAGETAR}.tmp

.if defined(IMAGETAR_RELEASEDIR)
release:: check_RELEASEDIR .WAIT ${IMAGETAR}
	${RELEASE_INSTALL} ${IMAGETAR} \
	    ${RELEASEDIR}/${RELEASEMACHINEDIR}/${IMAGETAR_RELEASEDIR}
.endif

.endif	# ! defined(IMAGETAR)					# }


.endif	# _MAKEFILE_IMAGE_